Yamaha campaign no m5-036.motorcycles.possibility that an oil delivery pipewas installed by the factory one inch too long.the oil tank is lifted duringpre-delivery set-up procedures and it is possible to kink the oil deliverypipe.if this condition exists, it will restrict the oil flow to the oil pump.oil starvation to the engine could occur causing piston to seize and a suddenlocking of the rear wheel.(correct by inspecting and cutting one inch offpipe and installing a stronger oil pipe protector spring).